Toggle latch



V Patented May 26,1931

are 3mm P A TEtJi.

;. nanny J. LINGAIJ. for PITTSB RGH; rnn vsYLvANIA, ASSIGNOR 'ro asrrmer ons13: I o ELECTRIC & ANUrAo'rUazne COMPANY, A CORPORATION or 'EENNSYLVANIA' 'roeetn LATCH v m -am lfiled m 12,

.' [My inventionbomprisesa trigger latch- I ing member therefor.

ing mechanism 'andmore particularly a loch One object of my nvention is to provide a trigger and a latch with a mechanism that V securely locks it into closed position.

. engagement with the trigger. g a

A further object of my invention is to pro- Another object of invention is to pro vide a-trigger with a spring-biased toggle that is-r'eleased by the latch-before coming into vide atrigger and a'la tch with a locking tog- V gle that is biased to its center or. beyond its center position by a spring" member and is released therefrom by the operationi f th pp ng mechanism.

' 1 Heietofore, circuit breakers and other api mechanism which can be better understood by referring to the drawings, inwhich,

Figure 1 is aiview partly-in elevation and partly in section; showing; an embodiment of toggle and the trigger.

my invention in its closed and locked position; Fig. 2 is a similar. view showing the tripping mechanism energized for releasing the My invention comprises, in general; acir- 'cuit interrupter 1 or other similar device requiring a. trigger 2 and alatch 3 that requires a positive locking member to retain the trigger and latch in'engagement until positively i so:

tripped by the tripping mechanism. 7

The trigger 2 is hingedlysupported on a 'member 4 by a pin 5 and comprises also a pin 6 at its opposite end. A projection 7 engages a roller 8 of the latch 8 and thereby prevents the latch from moving in an upward direction. The pin 6 pivotally supports one member 9 of the toggle mechanism; the other member 11 being pivotally supported by a pin 13. The adjacent ends of the members,

11 and 9 of the toggle mechanism are connected'by a pin 14.

The toggle member 11 has arms 15 and 16 1927. Serial 110,190,?12.

and a stop member 17 adjacent to each-other near thepin 13. The arm 15is provided with a-hole 18 through which a red 19 f-ree' ly projects. The rod 19 acts as a' guide for.

a spring 21 and a guidewasher 22 for bias? ing the t-ogglemechanismilltoward its for- 'wardposition, thus. holdingfthepins :14, 6 and llain substantially the same: plane or slightly beyond the dead center position of thetogglemechanism. The spring 21 acts upon the arm 15,. the toggle members 11 and 9 andthe pin 6 to bias the trigger 2to a forj ward position in which its projection :7 :en-

gages the roller 810i? thelatch 8. The .arm16 of the toggle member 11 is so placed that, when struck by the stem 2310f the core of the solenoid 241, the toggle member 11 -ismoVed in aolockwise direction to overcome the biasing force of the spring 21 and move the trige ger projection 7 out of engagement .with the' roller 8. i

,The toggle member comprisessalsoiian extension 25 that projects beyond the projec' tion 7 to be engaged by the roller 8 for up: setting the toggle mechanism-when the latch 3 is moved downward to effect latching engagement of its roller 8 with-the projection 7., Thestop 17 on the toggle member 11 operates to prevent the spring 21 from moving the toggle mechanismtoo far forward by strik ing against ashoulder 26 of the supporting member 12.. I v 1 V Assumingthe circuit, interrupter, tobe "in the open position, ;he latch 73 will be-in .a

raised position similar tothat shownin Fig.

2, and the toggle mechanism and the trigger willbefblased to the1r forward;pos1t1ons,jas shown 1n Flg. r Y

1 .Upon' downward movement of the latch i the roller 8 strikes against the extension 25 of the toggle member 9. and, thus moves the o member in a counter-clockwise; directiomf 7 thereby moving the-pin 1 1 above; theplan'e through-the centersof the two pins 6 and 13.- The trigger 2 isthus releasedto permit thev roller8to pass theprojection of the trigger,

Thespring 21 thereupon biasesthe; toggle 7 member 1 1 in a counter-clockwise direction to move the trlgger 2 intothe pos1t1on shown lIlFlg. 1; The contmued biasing action of the spring 21 moves the pin 14 downwardly to or beyond the plane of the pins 6 and13, thereby locking the trigger '2 in th e position shown in Fig. l.

7 'To release the'latch 3, the solenoid 24 is en ergized, thereby moving the stem-23lupward into engagement "w1th' the arm 16, which imparts a clockwise movement to thejtoggle:

member 11. The pin M is thereby moved f-romthejeejnter position to eitect a oloekiiise movement of the'trigger 2; 'Phisonove the projection 7 out of engagement with the roller 8 of the latch 3', which is thereby released;

Y Upon deenergization' ofthesolenoidQL, the;

stem 23 drops downward to release firearm v "16, and the toggle member, 11L ismoved in a until thestop member 17 engages the stopl26 of the support 12. "The triggerir2 isi'a gain' locked in its latching 'position from which: it can be'moved only by a forceacting on' the projection 0f the-memberQ.

a so

' Accordingly, I have inventedia sin'apl'e lo'ok v ing mechanism for a trigger i'thatris positive inits operation and that fnnctions'to prevent the opening ofthe 'interrupten from ashoclo-or Vibration that maybe impart-ed to-ita V :It :is to 'be' understood that changes-in the form, arrangement and .l conn'e-cti-ons 'ofe'th'e component{partsv of :invention vmay be made Without} departing from itsziprinciplep I' desirgthereforegithat the'=scopethereof shall beiliinited only as indicated in thea' app'enil'ed 'clanns; ,i 4 I cl'aim'asimy invention :1

The combination with a" latch gar-1.5a

for supporting the" triggeig: a? togglesm'ecln ani-sm for locl zing thetriggerinengagfirigpo sition and a'Jspring' for actuating -theitoggle mechanism"to "lo'ckedpositi'on. 1 V J Thecombination with :a ,itr iggenmi a latch engaged :Ithereby,=ai toggle ofor ciloclo ing 3' the trigger ::in latoh engagingo osi tion,' means adapte di'towi be flengaged zi'b'y the 'l'at ch to upset the toggleato permit the latch to be engaged by the triggen-aiid atrip:

ping: mechanism adapted to operaterther-toggle and the triggerlto release thedatch-fis' 3.'The combination with a triggerfofz-a locking mechanism therefor, a latchri erigage-i 'tion, releasing means on theilocking imecha I a nism operated by the 'latch whenwmoye'd'ginto lease "the latch.

engagement with the triggeri'andf aftrippin g "setting the toggle mechanism.

'ger': for: engaging ithe i lawn; a; fixed? bers ha ing a projection to be engaged by the latch during its movement into engage} ment with the trigger, and an additional means for upsetting thetoggle mechanism and the trigger after thelatch has been en gaged thereby.

116, 'The COmblH -tlOIl' etvith a latch-arm, of

engaging means for retaining thearm in fixed position, a toggle mechanism comprising two "g membiers {pivoted J together fo1 f 1obking the *"engagmgr'rie'ans-andpro ections on each of themembers-adapted to be engagedjfor up i a triggenfor retaining it in fixed position, a

( The combination: with 1a latch arm, of 7 toggle mechanism comprising twowm'embers plvotedwtogether -"fOI'v'lOCk1ng g-thestriggern n fixed position, each j of thecmembersa-having a projection to bfi" llgaged'ft0dHPSQFiil'IGrtOgl gle" Inechani'sm, biasing member "ionre tam ng-the 'toggleimeehanmsm in; 1ocked;.-pos1 tron.

. 1 8. Thecombinatio 0W h :avlatching;i arm,

ofra trigger. forz'engagi-n-g said datohing (arm; 7

a toggle mechanism hingedly+snpportedaatone zen-d and-ihaying vits 'other en-d ipivotally attached-ito 'the-endiofntheitrigger;iaispring V for i'forcingi the trigger rinto engage-d rposition vand t'ossecure; Eit'vt-herein byi-iforcing 1 the toggle mechanism to;oriibeyond itsidead minter,' and upsetting-means tori t-lia-togglezmech'r" anismw operateda-byzl the :llatchw before-,its engagementwithzthez triggen; g

? 9; The combination 'withvalat- 1:

fon supporting. thewtri'gger; oggle =-.meohanisnnforilocking the triggernrr -positionaand meansfonbiasing daheitriggersand the'ztoggle mechanism to; lockingnp'o'sition I p :10. r Incombination; a, trigger, :ai latch; a

- toggle mechanismi fpl flfllfiklll l'lthec trigger in engaging; positionaonameniber of itheltoggle mechanism rihawmgL-a a.;:pro3ection be'fzengaged who: latch-z to; op ei'ate :ithe wtoggle' i mechanism for operating theztrigger torareg 4. The combination with position, a'togg lemechanism comprising two memberspivoteditogether @for :loekingtthe engaging means. 1 r

5. In combination, :a trigger; latcln za i'spring-biased to'ggleimefchanismf for :locking 7 the triggerin fixed position-,one otitsi m em a ilatch'i armpo f" 7 engaglng means forretaimng the armnnifixe'd 

